We recommend oil and filter change 40K mile intervals.
For performance/off road/track use make more frequent changes for better 4wd locking ability.

This is the most common fault with Generation 4 Haldex vehicles.

The filter which “does not exist” according to VW/Audi gets clogged up as it is never changed on services, it does not exist on their parts system, and on their diagrams is listed as “fitted for life, non service item”. But we stock and sell them.
01155 – Clutch – 003 – Mechanical Failure – Intermittent
02248 – Valve for Controlling Clutch Operating Angle (N373) – 014 Defective – Intermittent